linux-kernel - Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186 onward

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Message-ID: <9ab1a77c-82e6-39be-9b90-b394037fb574@gmail.com>
Date:   Sat, 19 Mar 2022 19:14:51 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ashish Mhetre <amhetre@...dia.com>,
        krzysztof.kozlowski@...onical.com, robh+dt@...nel.org,
        thierry.reding@...il.com, jonathanh@...dia.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186
 onward

16.03.2022 12:25, Ashish Mhetre пишет:
> +static int tegra186_mc_get_channel(const struct tegra_mc *mc, int *mc_channel)
> +{
> +	u32 status;
> +
> +	status = mc_ch_readl(mc, MC_BROADCAST_CHANNEL, MC_GLOBAL_INTSTATUS);

This mc_ch_readl(MC_GLOBAL_INTSTATUS) is replicated by every
tegraxxx_mc_get_channel(), it should be a part of common interrupt
handler, IMO.

And then I'd rename that callback to global_intstatus_to_channel().

> +	switch (status & mc->soc->int_channel_mask) {
> +	case BIT(0):
> +		*mc_channel = 0;
> +		break;
> +
> +	case BIT(1):
> +		*mc_channel = 1;
> +		break;
> +
> +	case BIT(2):
> +		*mc_channel = 2;
> +		break;
> +
> +	case BIT(3):
> +		*mc_channel = 3;
> +		break;
> +
> +	case BIT(24):
> +		*mc_channel = MC_BROADCAST_CHANNEL;
> +		break;
> +
> +	default:
> +		pr_err("Unknown interrupt source\n");

dev_err_ratelimited("unknown interrupt channel 0x%08x\n", status) and
should be moved to the common interrupt handler.